I write stuff~?
It's a joke that my writing speed is the result of using two keyboards.
I guess I didn't make it clear, but Wu basically changed his entire style and outfit before leaving the village. So yes, he 'is' in disguise, just not transformed. As for the matter of his informants? Orochimaru's information network isn't 'that' expansive. Wu was also a student days before he left the village, and Danzo has no overt reason to inform Orochimaru of Wu's existence. He would definitely do so if there were some benefits to be had, but, while he and Orochimaru do collaborate a lot, neither trusts the other.
He only has a point if you ignore the context. Wu might have been a psychopath who killed himself, but he lived for thirty-seven years without anyone knowing about it. You should read up on the differences between a psychopath and a sociopath. It's pretty interesting.
Only the memories related to himself and others were erased. Much of his knowledge remained intact.
Finally! You're the first person to make the connection between her and the bull-demon king. I even described her horns as bull-like, but no one commented on it!
He probably won't have many kids.
There is such a thing as Transformation Jutsu...
Eh, not really.